Pyrotechnic switching device
a switching device and pyrotechnic technology, applied in the direction of electrical devices, conductor severing switches, switches operated by excess current, etc., can solve the problems of coupling of this type, interruption of current, and tripping of switches, so as to improve the reliability of electrical switching and operation. reliable
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first embodiment
[0036]FIG. 1 shows an exploded view of a switching device 1 according to the invention. The illustrated switching device 1 comprises: a body 10, a pyrotechnic initiation system 20, a piston 30, a conductive portion 40, a fuse element 50, and a support 60. The fuse element 50 is, according to the invention, connected in series with the conductive portion 40. In the example illustrated, the longitudinal direction L corresponds to the direction in which the conductive portion 40 extends in the device 1. The transverse direction T is perpendicular to the direction L in the plane of the conductive portion 40.
[0037]The body 10 comprises two lateral openings 11 on two opposite faces of the body 10 (only one lateral opening 11 is visible in FIG. 1) by which the support 60 can be inserted into the interior of the body 10, a lower opening 12 (FIGS. 2A-3B) by which the piston 30 can be inserted into the interior of the body 10, and two upper openings 13a and 13b protruding on an upper face of ...
second embodiment
[0048]FIGS. 5 and 6 show respectively a switching device 1′ according to the invention in longitudinal section, and the conductive portion 40 that it comprises. The device 1′ differs from the device 1 described previously by the fact that the fuse element 50′ constitutes a thinned zone of the conductive portion 40, as can be seen better in FIG. 6. Electrical wires (shown by dotted lines) can thus be provided in the device 1′ to connect the connectors 21a of the first initiator 21 in parallel with the fuse element 50′, as illustrated in FIG. 5. The switching device 1′ operates in the same manner as the device 1 described previously.
third embodiment
[0049]Finally, FIG. 7 shows a switching device 1″ according to the invention, in longitudinal section. The device 1″ differs from the device 1 described previously by the fact that the fuse element 50 is present inside the body 10 and in a second chamber, consisting here of a cavity formed by the opening 12 and delimited by the support 60, distinct from the chamber 15. As before, electrical wires (shown by dotted lines) can be provided in the device 1″ to connect the connectors 21a of the first initiator 21 in parallel with the fuse element 50, as shown in FIG. 7. The switching device 1″ operates in the same manner as the devices 1 and 1′ described previously.
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